class Promise;
class Scheduler;
class Thread;
+struct model_snapshot_members;
/** @brief Shorthand for a list of release sequence heads */
typedef std::vector< const ModelAction *, ModelAlloc<const ModelAction *> > rel_heads_list_t;
int maxfuturedelay;
unsigned int fairwindow;
unsigned int enabledcount;
+ unsigned int bound;
+
+ /** @brief Maximum number of future values that can be sent to the same
+ * read */
+ int maxfuturevalues;
+
+ /** @brief Only generate a new future value/expiration pair if the
+ * expiration time exceeds the existing one by more than the slop
+ * value */
+ unsigned int expireslop;
};
struct PendingFutureValue {
- uint64_t value;
- modelclock_t expiration;
- ModelAction * act;
+ ModelAction *writer;
+ ModelAction *act;
};
-/**
- * Structure for holding small ModelChecker members that should be snapshotted
- */
-struct model_snapshot_members {
- ModelAction *current_action;
- int next_thread_id;
- modelclock_t used_sequence_numbers;
- Thread *nextThread;
- ModelAction *next_backtrack;
+/** @brief Records information regarding a single pending release sequence */
+struct release_seq {
+ /** @brief The acquire operation */
+ ModelAction *acquire;
+ /** @brief The head of the RMW chain from which 'acquire' reads; may be
+ * equal to 'release' */
+ const ModelAction *rf;
+ /** @brief The head of the potential longest release sequence chain */
+ const ModelAction *release;
+ /** @brief The write(s) that may break the release sequence */
+ std::vector<const ModelAction *> writes;
};
/** @brief The central structure for model-checking */
void add_thread(Thread *t);
void remove_thread(Thread *t);
- Thread * get_thread(thread_id_t tid);
- Thread * get_thread(ModelAction *act);
+ Thread * get_thread(thread_id_t tid) const;
+ Thread * get_thread(ModelAction *act) const;
thread_id_t get_next_id();
- int get_num_threads();
+ unsigned int get_num_threads() const;
Thread * get_current_thread();
int switch_to_master(ModelAction *act);
bool isfeasible();
bool isfeasibleotherthanRMW();
bool isfinalfeasible();
- void check_promises(ClockVector *old_cv, ClockVector * merge_cv);
+ void check_promises_thread_disabled();
+ void mo_check_promises(thread_id_t tid, const ModelAction *write);
+ void check_promises(thread_id_t tid, ClockVector *old_cv, ClockVector * merge_cv);
void get_release_seq_heads(ModelAction *act, rel_heads_list_t *release_heads);
void finish_execution();
bool isfeasibleprefix();
void set_assert() {asserted=true;}
+ bool is_deadlocked() const;
/** @brief Alert the model-checker that an incorrectly-ordered
* synchronization was made */
void set_bad_synchronization() { bad_synchronization = true; }
const model_params params;
+ Scheduler * get_scheduler() { return scheduler;}
+ Node * get_curr_node();
MEMALLOC
private:
/** The scheduler to use: tracks the running/ready Threads */
Scheduler *scheduler;
+ bool sleep_can_read_from(ModelAction * curr, const ModelAction *write);
bool thin_air_constraint_may_allow(const ModelAction * writer, const ModelAction *reader);
+ bool mo_may_allow(const ModelAction * writer, const ModelAction *reader);
bool has_asserted() {return asserted;}
void reset_asserted() {asserted=false;}
int num_executions;
int num_feasible_executions;
bool promises_expired();
-
+ void execute_sleep_set();
+ void wake_up_sleeping_actions(ModelAction * curr);
modelclock_t get_next_seq_num();
- /**
- * Stores the ModelAction for the current thread action. Call this
- * immediately before switching from user- to system-context to pass
- * data between them.
- * @param act The ModelAction created by the user-thread action
- */
- void set_current_action(ModelAction *act) { priv->current_action = act; }
+ void set_current_action(ModelAction *act);
Thread * check_current_action(ModelAction *curr);
- ModelAction * initialize_curr_action(ModelAction *curr);
+ bool initialize_curr_action(ModelAction **curr);
bool process_read(ModelAction *curr, bool second_part_of_rmw);
bool process_write(ModelAction *curr);
bool process_mutex(ModelAction *curr);
bool process_thread_action(ModelAction *curr);
+ void process_relseq_fixup(ModelAction *curr, work_queue_t *work_queue);
bool check_action_enabled(ModelAction *curr);
bool take_step();
void reset_to_initial_state();
bool resolve_promises(ModelAction *curr);
void compute_promises(ModelAction *curr);
+ void compute_relseq_breakwrites(ModelAction *curr);
void check_curr_backtracking(ModelAction * curr);
void add_action_to_lists(ModelAction *act);
void post_r_modification_order(ModelAction *curr, const ModelAction *rf);
bool r_modification_order(ModelAction *curr, const ModelAction *rf);
bool w_modification_order(ModelAction *curr);
- bool release_seq_head(const ModelAction *rf, rel_heads_list_t *release_heads) const;
+ bool release_seq_heads(const ModelAction *rf, rel_heads_list_t *release_heads, struct release_seq *pending) const;
bool resolve_release_sequences(void *location, work_queue_t *work_queue);
- void do_complete_join(ModelAction *join);
ModelAction *diverge;
ModelAction *earliest_diverge;
* to a trace of all actions performed on the object. */
HashTable<const void *, action_list_t, uintptr_t, 4> *lock_waiters_map;
+ /** Per-object list of actions. Maps an object (i.e., memory location)
+ * to a trace of all actions performed on the object. */
+ HashTable<const void *, action_list_t, uintptr_t, 4> *condvar_waiters_map;
+
HashTable<void *, std::vector<action_list_t>, uintptr_t, 4 > *obj_thrd_map;
- std::vector<Promise *> *promises;
- std::vector<struct PendingFutureValue> *futurevalues;
+ std::vector< Promise *, SnapshotAlloc<Promise *> > *promises;
+ std::vector< struct PendingFutureValue, SnapshotAlloc<struct PendingFutureValue> > *futurevalues;
/**
- * List of acquire actions that might synchronize with one or more
- * release sequence. Release sequences might be determined lazily as
- * promises are fulfilled and modification orders are established. Each
- * ModelAction in this list must be an acquire operation.
+ * List of pending release sequences. Release sequences might be
+ * determined lazily as promises are fulfilled and modification orders
+ * are established. Each entry in the list may only be partially
+ * filled, depending on its pending status.
*/
- std::vector<ModelAction *> *pending_acq_rel_seq;
+ std::vector< struct release_seq *, SnapshotAlloc<struct release_seq *> > *pending_rel_seqs;
- std::vector<ModelAction *> *thrd_last_action;
+ std::vector< ModelAction *, SnapshotAlloc<ModelAction *> > *thrd_last_action;
NodeStack *node_stack;
/** Private data members that should be snapshotted. They are grouped
* together for efficiency and maintainability. */
struct model_snapshot_members *priv;
+ /** A special model-checker Thread; used for associating with
+ * model-checker-related ModelAcitons */
+ Thread *model_thread;
+
/**
* @brief The modification order graph
*
projects / c11tester.git / blobdiff